Jonathan I. Sperl1, Ek T. Tan2, Marion I. Menzel1, Kedar Khare2, Kevin F. King3, Christopher J. Hardy2, Luca Marinelli2
1GE Global Research, Garching n. Munich, BY, Germany; 2GE Global Research, Niskayuna, NY, United States; 3GE Healthcare, Waukesha, WI, United States
Diffusion spectrum imaging (DSI) acquisition can be accelerated by randomly undersampling q-space and subsequent compressed sensing (CS) reconstruction. This work presents several extensions to CS-DSI, namely the combination of the approximate message passing (AMP) and Nesterov updates, the application of AMP to total variation minimization, and random translations for wavelet based CS. All methods can be combined yielding superior convergence properties. Fiber simulations and in vivo brain data are analyzed demonstrating the improvements in terms of speed and accuracy.